Thanks everyone for the suggestions. As of now, we have 4 songs we want to do.
Green Onions by Booker T. and the Mgs
Peter Gunn Theme, I'm guessing by Peter Gunn, but it's pretty much the Blue's Brothers theme.
Wizards In Winter by the Trans Siberian Orchestra
Circle House Blues by Slightly Stoopid
The Basisst also says that he will try to sing Tom Sawyer by Rush, so we'll see how that goes.